Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2004-08-06
2008-12-30
Tran, Khai (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S260000
Reexamination Certificate
active
07471732
ABSTRACT:
A method and apparatus for a multiple channel communication device training, and processing utilizing a transmit signal power control operation. Multiple channel communication devices utilize inter-channel crosstalk mitigation techniques, such as MIMO processing modules or MIMO precoding systems, to cancel unwanted crosstalk coupling across active and provisioned channels. Upon provisioning and activation of a new channel that connects to the multiple channel communication device the signal on the new channel couples into other channels and the existing MIMO filtering or processing structure is untrained to mitigate the crosstalk from the new channel. A power control training operation prevents crosstalk from hindering operation on other channels during the training operation. During one example training operation, the power level of a transmit signal is incrementally increased as the crosstalk cancellation filter(s) are trained.
REFERENCES:
patent: 5285474 (1994-02-01), Chow et al.
patent: 5479447 (1995-12-01), Chow et al.
patent: 5673290 (1997-09-01), Ciofffi
patent: 5887032 (1999-03-01), Cioffi
patent: 6252901 (2001-06-01), Mueller et al.
patent: 6345071 (2002-02-01), Hamdi
patent: 6353636 (2002-03-01), Tate et al.
patent: 6520744 (2003-02-01), Verbin et al.
patent: 6567464 (2003-05-01), Hamdi
patent: 6587502 (2003-07-01), Hendrichs et al.
patent: 6711207 (2004-03-01), Amrany et al.
patent: 6870882 (2005-03-01), Al-Dhahir et al.
patent: 2001/0027392 (2001-10-01), Wiese, Jr.
patent: 2001/0048667 (2001-12-01), Hamdi
patent: 2002/0111156 (2002-08-01), Roeder
patent: 2003/0026282 (2003-02-01), Gross et al.
patent: 2003/0081759 (2003-05-01), Harris
patent: 2003/0086362 (2003-05-01), Hasegawa et al.
patent: 2003/0123487 (2003-07-01), Blackwell et al.
patent: 2004/0085987 (2004-05-01), Gross et al.
patent: 2004/0105465 (2004-06-01), Gross et al.
patent: 2004/0223511 (2004-11-01), Tzannes
patent: WO 03/105339 (2003-12-01), None
patent: WO 03/105352 (2003-12-01), None
Eric W. Weisstein, “Eric Weisstein's World of Mathematics—Diagonal Matrix”, © 1999 CRC Press LLC, © 1999-2003Wolfram Research, Inc.,2 pages.
Steffen Trautmann, et al., “A New Equalizer for Multitone Systems Without Guard Time”,IEEE Communications Letters,vol. 6, No. 1, Jan. 2002, pp. 34-36.
Jeffrey Wu, et al., “Efficient Matrix Multiplication Methods to Implement a Near-optimum Channel Shortening Method for DMT Transceivers”, The University o Texas at Austin, Asilomar Conference, Oct. 30, 2000, 14 pages.
J. Cioffi, “Digital Duplexing: VDSL Performance Improvement by Aversion of Frequency Guard Bands (TD13)”, ETSI TM6 Endinburgh, Sep. 20-24, 1999, pp. 1-16.
Lei Wang, et al., “Low-Power AEC-Based MIMO Signal Processing for Gigabit Ethernet 1000Base-T Transceivers”, Copyright 2001, ACM 1-58113-371-5/01/0008, pp. 334-339.
Arthur Redfern, et al., “Expanding the Reach of ADSL”, http://www.commsdesign.com/story.OEG20030717S0028, Jul. 17, 2003, 2 pages.
Aktino, Inc.
Tran Khai
Weide & Miller Ltd.
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